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Published in last 50 years
An erbium-doped fluorozirconate fibre laser has been constructed which uses up-conversion pumping at 801 nm to excite a higher-level laser transition at 850 nm. A slope efficiency of 38% was measured.
An optical gain of 18.3 dB at a signal wavelength of 2.707 μm is obtained in an Er3+ doped fluorozirconate fibre pumped at 0.647 μm. The saturation power of the amplifier is estimated to be around 2 mW.